Flue-plug.



PATENTED MAYso, 1905..`

A P. J. MALLOY.

PLUE PLUG'. APPLICATION FILED MAB.'I1, 1905.

ATTORNEYS UNITED STATES Patented May 30, 1905.

PATENT OFFICE.

PATRICK J. MALLOY, OF SHREVEPOR'I, LOUISIANA, ASSIGNOR OF ONE- FOURTH TOJOHN MCWILLIAMS FORD, SI-IREVEPORI, LOUISIANA.

.FLuE-PLUG..

SPECIFICATION forming' part ofv Letters Patent No. 791,351, dated May30, 190.5.

Applicationled March 11,1905. Serial No. 249,664.

To a/ZZ whom t may concern:

Be it known that I, PATRICK J. MALLOY, a

citizen of the United States, and a resident of lowing is aspecification.

. tact with the flue-sheet over the bead and My invention is animprovementv in fluevplugs, and has for an object to provide a plug forclosing a Hue when desired and having means for covering .theV end ofthe Hue so in case of bad leaks it will cover the entire bead `0f theiiue and if the plug leaks the water will be tu med-downward along theliuc-sheet instead of spraying outover the fire; and the' lInventionconslsts 1n certain novel constructions and combinations of parts, aswill be hereinafter described and claimed.

In the drawings, Figure 1 is an end 'elevation of my improved plug. Fig.2 is a side view thereof in place in a flue-sheet. Fig. 3 is a view ofthe opposite end of the plug from that shown in Fig. l, and Fig. 4 is asectional view of the plug in place in aflue.

lThe iue A is appliedV to the sheet B with a flanged end or bead a uponvthe outer side ofV the Hue-sheet. The plug has the tapered body portionO to t in the fiue and which'may be driven firmly into place, theface-plate` D to fit against the iue and provided in its inner face witha groove E,.'receiving.the bead a, and having at its lower side anoutlet or nozzle e, opening alongside the ue-sheet B at the -bottom ofthe plug, and at its outer end the plug has a socket F to receive theend of an extension-rod or plugging-bar by which the plug may beinserted in the end of a leaky fl'ue through the furnace-door. The bodyof the plug is tapered or bell-shaped, so it can be forced firmly intoposition and will t dierlent-sized fiues within a reasonable range. `It

forming a joint against the flue-sheet, the

plug being so placed that the outlet or nozzle c lis at the bottom, sothat any leakage not stopped by the action of the tapered plug will passinto the groove E and be discharged against the flue-sheet.

The plug when applied to one fine will not interfere with any oftheother liues, can be easily inserted with a Hue-bar, presents butlittle metal outside 'of the Hue-sheet to get redhot and burn ofi or tocause much expansion of the flue-sheet, and can be used in any kind ofboilers without danger to the boiler.

As best shown in Fig. 4, the groove E is undercut, forming aninwardly-projecting iiange E', which overhangsthe groove E and forms agutter or trough leading to the outlet c, as will 'be understood fromthe drawings.

Having thus describedmy invention, whatI claim as' new, and desire tosecure by Letters Patent is- 1. The combination with a flue-sheet and aflue therein and ianged or beaded outside the flue-sheet, of a`fiue-plughaving a tapered body portion driven into the lend of the ue, aface-plate or. flange overlapping the fluesheet surrounding the beadedend of the ue and grooved in its inner face. to tit over the bead and toform a channel for leakage and having a discharge outlet or nozzle, theplug being providedl in its outer end with a socket for a iue-bar inapplying the plug substantially as set forth.

2. A flue-plug comprising the body adapted to be driven in aiiue and aface-plate or flange at the outer end of the body portion and having anundercut groove in its inner face to iange grooved in its inner face toform av channel for leakage and having an outlet or nozzleleading fromsaid channel, substantially tending around the face-plate and an outletto as set forth. I which said gutter discharges, substantially :is

5. A Hue-plug having a body portion to be Set forth.

driven into a. flue and provided with a faee- PATRICK J. MALLOY. 5 plategrooved in its inner face and having said Witnesses:

groove undercut providing an inWardly-prol J. C. PUGH,

jeeting flange forming a gutter or trough eX- l J. K. VALKER.

